Example Accumulation

[francisvandergr]

See attachment What  i want is the following. Before period 1 i want the end of period 0. How can i achieve this ? I want the same for period 2 and 3 i tried something with above function

[Gysbert_Wassenaar · Accepted solution]

See attached qvw

[francisvandergr]

Super thnx!